Latest version is 0.10.0. The documentation site can be found at https://odf.openpreservation.org/
Open Preservation Foundation's OpenDocument Format Validator (OPF ODF Validator) enables your organisation to validate the file format standard and a set of file format policy rules created for improving the preservation effort of any files saved in the OpenDocument Format.
For getting started with building and running the software see https://odf.openpreservation.org/#quick-start